Cutter-holder.



' W. H. BINGER.

CUTTER HOLDER. APPLICATION FILED MAY 2, 1910. RENEWED SEPT. 9, 1912.

1,042,190. Patented Oct. 22, 19-12. I

B I WITNESSES:- 9 1 5 .7 Kalil 5152M? @iQi-Tw By A TTORNBY STATES mum OFFICE r wx-ttran;nnnnv.nrnonn, or SAN FRANCISCO, 'oALIFonn'i'eI isms-ea .OF'ONE-HALF- g; rqwvznnmm HENRY BURNETT, orsa'n rnanorsoo, CALIFORNIA.-

Specification of was Patent.

Bat ented'Qct. 22,1912; I I

Application filed Iay'2,,1910, Serial 110.558322. Renewed. September-9,1812. lsei ia no. 719.446,

To all whomit may concern:

B8'li3 k1 10 WIl that-I WILLIAM H. BINGER, aei tifenot the Un-itd States, residing at San,-'Fran ciseo,{ in-'the county of San Franeiscfo and State of California, have inventednew and useful Improvements in Cutter- Holders, o'f which the following is a specifica/tion.

3 This invention relates to an improvement in cutter holders.

In using cutter. holders of the present construction for cutting through a piece of metal or putitng a groove therein, chips" of the inetal sometimes become lodged in the.

groove which is being out, and thus present toogrea' bresistanceto the movement of the cutter in the groove. Since the machine in which'the cutter holder is itself held will not be arrested; by this resistance thus created, it results in each case that,.-either the point of the cutter will break off, or the metal which is being cut will be moved out of position. I

One object of my invention is to avoid this result, thus dispensing with the greatcare in overseeing the operation whichis necessary in using the present forms of cutters.

A further object of the invention is to provide a cutter holder which will readily permit of the cutter being held at any desired angle with the work.

A further object is to provide a cutter holder which, without changing the body of the holder, can be used as a right or as a left hand cutter, as may be desired.

In the accompanying drawing, Figure 1:

is a plan view of the cutter holder with the cutter therein; Fig. 2 is a side view of the.

this conical hole is received a clamp 4, which comprises a threaded stem 5, a clamp head 6 having under-cut grooves 7 to receive the cutter l i, and a conical neck 8, connecting said head wathsaid stem. bald neck is di- .vided-into twi) as. t

aslotgor'groove 9, lying-between and arallel with the two, underf cut grooves. 1 pen the, end of-thestem, the thread 'ofnwhich is a' right hand thread, f

is screwed a nut 10, having a. left-havndexze .6 0

ternal thread 11 and a flange ;.12; i U' 'jtlle inner :nut is screwed an outer nut 13,, aving a left-hand internal thread;- I

-The angle of taper of 'theconical portion;

of the neck is greater than that of the 1101853 I so thatthe conical surface ofthe'neck, does not-touch the conical surface of the hole'at all pointsthereo f, but only at the widest portion thereof. :Moreover the surfaoe of the neck on a section taken, at its widest por tion, as shown inFig'.5, is not in a, trnecirole, but is reduced in diameter at thertends of the slit or groove 9. Consequentlyfwhenyf;

the clamp .is pressed inward by the screwl ing of thenuts, ashereinafter d tainee/mate pressure on said clamp is only'at points My. the wider portion of the hole, and at the, ends of a diameter at right angles to the slit v or groove, that is, at points best adapted to .press. the two halves of the clamp toward each other to clamp the cutter therebetweeni In operation, the outer nut is screwed: upon the inner nut but not so far that itsend is in contactwith the flange 12' of .the inner nut; Then the inner nut isscrewed i upon the stem, care being taken that the outer nut turns with the inner nut, until the end of the outer nut inipinges upon the cutter holder. The screwing of. the inner nut upon the stem is-continued until its flange 12 abutsagainst the outer end of thev outer nut. Both nuts are then turned together, which has the. effect of drawing the clamp inwardly into the hole 3, thereby pressing l the two parts of the cutter holder together. The cutter holder will be held with sufiicient firmness to overcome any ordinar resistanc experienced in cutting; If, owever, owingto the chips of the metal being cut becoming lodged in the groove, or for some other reason, an' unusual resistance is offered in cutting the clamp will turn in the hole 3 and will thus avoid the breaking of the cutterv or displacement of the work.

An important feature of tliisinvention is that thefciit ter may be used either as a right or as a leftghand cutter and-the advantage above explained will -be attained in either case. This is due to the-fact that two nuts,

respectively of right and left-hand threads, 1:

Copies .of this patent may be obtained for are used, one screwed over the other. By the use of inner and outer nuts of opposing threads, it results that when the screw is turned in the holethat nut will remain stationary which is so threaded inrelation to the direction of turning the screw that it tends to unscrew. Thus if the cutter holder be in the'position shown in Fig. 1, and the lower point of the cutter is cutting through the metal and meets with unusual resistance, the clamp is caused to turn so that the screw unscrews from the inner nut, and which remains stationary. If, however, the cutter holder is reversed and used as a left handed cutter then the rotary movement of the clamp due to an extraordinary resistance in the work would tend to screw the clamp into the inner nut. In that case, the inner nut would move with the screw and would unscrew within the outer nut, and the outer nut would remain stationary. Thus in either case the tendency is for the clamp to be released from the hole in which it is obtained.

'It will readily be seen that the angle atwhich the cutter is held can be varied as desired.

I claim 1. A cutter holder comprising a stem, a clamp held thereby adapted to be rendered operative by motion in one direction with and external threads of reference to said stem, andinoperative by motion in the opposite direction, said clamp having a threaded portion, an inner nut screwed upon said threaded portion and arranged whenscrewed thereon to move the holder longitudinally in the direction to render it operative and an outer nut screwed I upon the inner nut, the inner and outer threads of the inner nut being right and left handed, substantially as described.

2. A cutter holder comprising a SlZGll1'l121-V ing a tapering hole, a clamp for the cutter having a tapering portion in said hole, and being pressed together by a longitudinal movement in said hole, the end of the cutter holder being threaded, an inner nut screwed formed of two parts adapted to be upon said. threaded end and an outer nut screwed upon said inner nut, the internal the inner nut being right and left handed, substantially as .described.

In testimony my hand in the presence witnesses.

WILLIAM HENRY BINGER.

FRANCIS M.- WRIGHT, D. B. Rro'nanns.

five cents Washington, D. 0.

each, by addressing the Commissioner of Patents,

whereofI have hereunto setof two subscribing 

